Diary Day one Supports text formatting but only two fonts, has a calendar view, "on this day", a nice user interface, the ability to filter notes by places, synchronize notes across devices, and IFTTT integration.
Android Diaro Fast, and supports drawings, geo-location on notes, tags, text-to-speech (read aloud), calendar view, map view, templates, 17 fonts, "on this day" flashback, and 35+ languages.
Diary Diary by Bill Farmer Diary is another great open-source app by retiree Bill Farmer. It has a ton of functionality including Markdown support, advanced features like tables and text highlighting, and best of all it's fast and free!
